EP1297934A2 - Vorrichtung zur Bildung von Gegenständen - Google Patents

Vorrichtung zur Bildung von Gegenständen Download PDF

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Publication number
EP1297934A2
EP1297934A2 EP02014655A EP02014655A EP1297934A2 EP 1297934 A2 EP1297934 A2 EP 1297934A2 EP 02014655 A EP02014655 A EP 02014655A EP 02014655 A EP02014655 A EP 02014655A EP 1297934 A2 EP1297934 A2 EP 1297934A2
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EP
European Patent Office
Prior art keywords
half mould
flowable material
cavity
suction
mould
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02014655A
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English (en)
French (fr)
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EP1297934A3 (de
Inventor
Enzo Mantegani
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1297934A2 publication Critical patent/EP1297934A2/de
Publication of EP1297934A3 publication Critical patent/EP1297934A3/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/021—Feeding the unshaped material to moulds or apparatus for producing shaped articles by fluid pressure acting directly on the material, e.g. using vacuum, air pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
    • B28B7/386—Cleaning

Definitions

  • the invention concerns a process for forming by means of dry compression ceramic objects of any shape from porcelain granulate or other similar material and a device for implementing said process.
  • the porcelain granulate for forming tableware is suitably compacted by prevalently using a known isostatic pressing process.
  • the non-isostatic pressing process in fact causes differences in compacting or density of the granulate material that limit the use of said process to a few types of ceramic product.
  • apparatuses are used that are equipped with two opposed half moulds.
  • One of these half moulds preferably the one used to form the back side of the object that is desired, is provided with an elastic membrane which is in contact with an uncompressible fluid that is cyclically pressurised so as to push the membrane towards the top half mould.
  • the application for utility model IT MI98U000041 discloses a mould for isostatic pressing of ceramic tiles, comprising an elastic membrane that is fixed to one of the two half moulds and which is interrupted by a plurality of air-removal valves, that are suitable for enabling the air initially present in the ceramic granulate to flow out through the openings with which said valves are provided.
  • a mould for isostatic pressing of ceramic tiles comprising an elastic membrane that is fixed to one of the two half moulds and which is interrupted by a plurality of air-removal valves, that are suitable for enabling the air initially present in the ceramic granulate to flow out through the openings with which said valves are provided.
  • Italian utility model IT 212838 discloses a mould for pressing dishes, wherein the two half moulds that cooperate to form the dish are bordered by an external cylindrical surface on which a matrix can slide, said matrix being suitable for peripherally closing a cavity defined by the two half moulds.
  • the matrix consists of two plates placed at a preset distance from one another, said plates defining a ring-shaped hopper wherein the ceramic granulate is inserted by means of an opening provided at a set point on the perimeter of the matrix.
  • the ceramic granulate is facilitated in entering the cavity owing to certain suction holes made on the half mould designed to form the visible surface of the dish. Such suction holes also enable the air that is initially present in the granulate to exit during the first pressing phases.
  • the mould-loading phase the ring-shaped hopper made in the matrix communicates with the mould cavity in such a way that the mould cavity can be filled with the material to be pressed; subsequently the matrix is translated along the external surface of one of the two half moulds, so as to peripherally close said cavity during the pressing phase.
  • a drawback of the mould disclosed in IT 212838 is that, since the supply of ceramic granulate is provided at a single point of the ring-shaped hopper, non-uniform distribution of the powder inside said hopper may arise, which may risk causing non-homogenous filling of the mould cavity.
  • suction holes are made on the half mould used to form the visible surface of the dish. Said holes may cause defects on the visible surface that will remain visible even after glazing, which significantly detracts from the quality of the product.
  • the half mould used to form the visible surface of the object e.g. the top half mould
  • the half mould used to form the visible surface of the object is made from stiff material that is preferably clad by a film of self-cleaning elastomer material.
  • self-cleaning material is desirable because it enables the cleaning of the relative half mould to be improved, it diminishes the gloss of the visible surface of the manufactured objects, which affects the final shine or brightness of said objects.
  • a stiff half mould can be used that has no cladding in elastomer material. Said half mould nevertheless requires frequent and thorough cleaning operations in order to maintain a highly glossy surface and to form ceramic objects that are equally glossy. Said cleaning operations are responsible for decreasing the productivity of the manufacturing line.
  • One aim of the invention is to improve the known devices for forming objects, particularly in ceramic material.
  • a further aim of the invention is to supply devices for pressing objects which enable the original material to be uniformly compacted, even when suction means is provided to facilitate pressing and/or filling of the mould.
  • Yet another further aim is to provide devices for pressing objects that ensure uniform filling and regular distribution of the material to be pressed within the mould cavity.
  • a further aim of the invention is to supply devices for pressing tableware that enable the quality of the tableware obtained to be improved by eliminating the defects on the surface that is destined to remain visible during use.
  • a further aim is to greatly reduce the formation of burrs due to the leak of powders from the closing zone of the half moulds.
  • One main objective of this invention consists in overcoming the constraints of the prior art by proposing an innovative manufacturing procedure and the relative device for implementing said process, which enables maximum productivity to be associated with manufacturing objects of better quality, thereby ensuring uniform transversal compaction in addition to gloss and shininess in the pressed objects, starting from the prior art, for which ample patent documentation is available.
  • the procedure for actuating it can be implemented by the device consisting of a top half mould that includes said convex punch that is fixed to the stiff structure of a press with a vertical axis by means of a top punch holder that is particularly elaborated, assisted by a plane-protecting plate and a fixed crosspiece, that carries hydraulic actuators that cyclically actuate a container with attached shutter ring, arranged around said top punch and containing the ceramic granulate for the mould on one side.
  • a bottom half mould that is axially opposite the top one comprises said concave elastic membrane with the incorporated insert and semistatic valve, hermetically housed in its own metal container provided with an element arranged under the membrane and perimeter seal ring.
  • Said bottom mould which is fixed to a plate that is horizontally movable on an air cushion, is translated cyclically outside the press to enable the pressed ceramic piece to be picked up and evacuated.
  • a rotating and lubricating brushing device is fixed to said movable plate, the brushing device is translated at the same time as the bottom mould and is positioned underneath the top static punch, working against its surface and cyclically ensuring its gloss.
  • the bottom mould is brought cyclically in contact with the top mould by means of suitable hydraulic actuators that are fixed to the structure of the press on one side and to the bottom mould on the other by means of a movable crosspiece.
  • a device for compacting flowable material, particularly for forming ceramic objects, comprising a first half mould interacting with a second half mould to define pressing cavity means, suction means associated with said first half mould (52) and suitable for assisting the entry of said flowable material into said cavity means, characterised in that, said suction means is so configured as to be operationally movable in relation to said first half mould.
  • the movable suction means enables better pressing of the flowable material to be obtained inasmuch as the position of the suction means in relation to the first half mould can be set at will so as to ensure good compaction even in the zones affected by the suction means.
  • the suction means both enables air to be eliminated from the flowable material to be compacted, by acting as an air-removal means, and the depressurisation of the cavity means during filling with flowable material, e.g. ceramic powders, and/or during pressing.
  • membrane means is anchored to the first half mould, said membrane means operationally defining chamber means suitable for receiving a fluid that can exert pressure on said flowable material.
  • the suction means is received in the membrane means.
  • the suction means is associated with stiff insert means that is movable in relation to the first half mould.
  • the stiff insert means exercises a stabilising function on the shape of the ceramic object the obtaining of which is desired.
  • the membrane means winds at least partially around the stiff insert means.
  • the stiff insert means comprises a disc element that preferably supports the suction means in its own central region.
  • actuating means is provided that is suitable for translating the suction means in relation to the first half mould.
  • the actuating means acts on sleeve means that is integral with said disc element.
  • seal means is associated with the sleeve means.
  • the seal means exerts a sealing action both on the fluid acting on the membrane means and on the air aspirated by the suction means.
  • Guide means can also be associated to the sleeve means, said guide means being arranged for keeping said sleeve means guided during movement in relation to the first half mould.
  • a device for compacting flowable material, particularly for forming ceramic objects, comprising a first half mould interacting with a second half mould so as to form cavity means suitable for receiving said flowable material, hopper means suitable for delivering said flowable material to said cavity means, characterised in that, distribution means is further provided, said distribution means being arranged for enabling uniform distribution of said flowable material in said hopper means.
  • the distribution means enables the flowable material to be uniformly distributed along the entire perimeter of the hopper means and therefore enables the cavity means defined between the first half mould and the second half mould to be uniformly filled. This constitutes a good basis for obtaining better compaction of the flowable material and therefore higher quality in the finished object.
  • the distribution means comprises a plurality of grooves, preferably arranged radially on a distribution element that substantially corresponds to the plan shape of the object to be pressed.
  • the grooves are bordered at the bottom by a bottom surface that diverges towards the zone of the distribution means that is nearest said first and/or second half mould.
  • the grooves are separated by protruding radial elements that preferably have a height that is the same as the height of said distribution element.
  • the distribution means further comprises diffuser means suitable for spreading the flowable material over a preset angle extension.
  • the diffuser means comprises blade means actuated to rotate around a preset rotation axis.
  • feeding conduit means is provided the outlet of which is near the diffuser means.
  • the flowable material coming from the feeding conduit means is conveyed by means of the diffuser means to the radial grooves of the distribution element, and said grooves deliver said material to the cavity between the half moulds into which it will be compacted.
  • the diffuser means comprises rotating blade means and as the grooves are arranged on the entire area of the distribution element, the flowable material is distributed over 360 degrees and can thus fill the hopper means in a significantly uniform manner.
  • the distribution means comprises spoon means suitable for distributing the flowable material along the entire area of the hopper means.
  • the spoon means is moved by chain means.
  • the chain means is so configured as to move the spoon means along a path that develops peripherally inside the hopper means.
  • input means is provided suitable for supplying the flowable material and arranged to the side of the spoon means.
  • the spoon means receives the flowable material from the input means and distributes said material over the entire perimeter area of the hopper means, optimising filling of the cavity means comprised between the first half mould and the second half mould.
  • the hopper means is bordered by shutter ring means, that is preferably movable through translation between an opening position, wherein the flowable material can reach the cavity means, and a closing position, wherein the flowable material cannot leave the hopper means.
  • the shutter ring means cooperates with punch means of the second half mould.
  • the distribution means is preferably contained inside container means that is bordered on the sides by transparent wall means.
  • the degree of filling of the hopper means by the flowable material can be checked.
  • level sensor means is associated with the container means, said level sensor means being arranged for detecting the quantity of flowable material inside the container means.
  • the level sensor means enables the correct quantity of flowable material to be restored in the container means, when this is necessary.
  • a device for compacting flowable material, particularly for forming ceramic objects, comprising a first half mould interacting with a second half mould to define pressing cavity means, said second half mould being suitable for shaping a surface of said objects that is to remain visible during use, characterised in that, cleaning means is further provided, said cleaning means being so configured as to interact cyclically with said second half mould.
  • the cleaning means enables the second half mould to be kept clean, thereby eliminating the need for cladding said second half mould with self-cleaning material, which cladding could impair the gloss of the finished object.
  • ceramic objects can be obtained that are provided with a high level of aesthetic properties.
  • the cleaning means is movable between a first position wherein it does not interact with the second half mould, and a second position wherein it cooperates with the second half mould.
  • the cleaning means is fixed to the first half mould.
  • the first half mould faces the second half mould so as to make said compacting possible.
  • the first half mould is distanced from the second half mould so as to enable said objects to be removed from said cavity.
  • Extractor means can further be provided that is suitable for removing said objects from the first half mould in the second position of the cleaning means.
  • the cleaning means moves from the first position to the second position to remove from the second half mould any residue of flowable material.
  • the first half mould goes to a position wherein it can interact with the extractor means, which removes the finished object. This enables operating time to be optimised, significantly increasing production without adversely affecting the quality of the produced objects.
  • the cleaning means comprises brush means.
  • lubricating means is associated with the cleaning means, said lubricating means being suitable for applying a lubricating substance to the second half mould.
  • the second half mould is kept suitably clean and lubricated, which enables an accurate surface finish of the pressed object and an easy removal of said pressed object from the second half mould to be obtained.
  • a device for compacting flowable material so as to form tableware, comprising a first half mould interacting with a second half mould to define cavity means wherein said tableware is formed, said second half mould being arranged for forming a surface of said tableware that is to remain visible, suction means suitable for assisting the entry of said flowable material into said cavity means, characterised in that, said suction means is operationally associated with said first half mould.
  • suction means is not associated with the half mould that will generate the surface of the tableware that is to remain visible, said surface is free of the defects caused by the suction means and is therefore provided with good quality and gloss of a high level.
  • Figure 1 shows the front view of a vertical structure of press 1 equipped with a horizontal conveyor 2, provided with a suction cup 2' to pick up the pressed object 50 and transfer it to a relative evacuator 3, whereas the numeral 4 indicates the position of the electro-hydraulic control unit of the assembly.
  • the flowable material e.g. ceramic granulate
  • the top half mould 51 consisting of: a stiff convex punch 6 that is fixed to the structure 1 by means of a top punch holder 26, shown in Figure 3, which punch holder 26 is connected in turn to the plane-protecting plate 9 and to the top fixed crosspiece 11.
  • the latter is equipped with double acting actuators 10 whose rods actuate a container 8 to which a shutter ring 7 is fixed.
  • the bottom half mould 52 is positioned, which consists of: a perimeter seal ring 12 that hermetically retains the concave elastic membrane 32, shown in Figure 3, on the containing body 13 underneath, having the form of a glass-like container, wherein an element arranged under the membrane or support 34 is provided, which is also shown in Figure 3.
  • the bottom half mould 52 is fixed to a plate 14 that is equipped with guides 19 and translation means 20.
  • the plate 14 is horizontally actuated to travel backwards and forwards on air cushion, on the underlying sliding plane 15.
  • the latter is connected in turn to the bottom crosspiece 16 that is cyclically actuated by relative hydraulic actuators 17 and 18.
  • Figure 2 shows, partially in section form, the side view of the press of Figure 1, showing the fact that a rotating brushing system 24 with attached tool 25 is fixed to the plate 14.
  • the translating means 20 moves the bottom half mould 52 in the direction of the arrow F1 from a first position A to a second position B.
  • the bottom half mould 52 faces the top half mould 51 and can interact with it to compact the ceramic granulate, whereas the brushing system 24 does not interfere with the top half mould 51.
  • the bottom half mould 52 moves to near the horizontal conveyor 2, whilst the brushing system 24 is arranged immediately below the top half mould 51.
  • Figure 2 also concisely shows a possible way of feeding the granulate into the press by means of the device 55.
  • Figure 3 shows the front section of the top half mould 51 and bottom half mould 52 in a filling and pre-forming phase of the ceramic granulate in the shaped cavity 36' defined between said half moulds when they face each other. This phase precedes the final closing phase with subsequent compacting of said material.
  • the preferred main feature of the stiff and convex top punch 6, consists in the fact that the shaped surface 6' is highly resistant to compression stress and wear and therefore, in addition to being hardened, is chromed and finely polished.
  • the top punch holder 26 has toothing or radial protruding elements 27 that are vertically separated by grooves 28 with tilted planes that decrease on the perimeter.
  • the top punch holder 26 comprises a distribution element that has a shape that substantially corresponds to the plan shape of the object 50 to press, on said distribution element the radially arranged grooves 28 being made.
  • the grooves 28 are inferiorly bordered by a bottom surface 28' that diverges towards the zone of the distribution element that is nearest the first half mould 52 and/or the second half mould 51.
  • the bottom surface 28' is provided with a frustoconical shape.
  • the grooves 28 are separated by the protruding elements 27, that are preferably equidistant from one another, that develop from the bottom surface 28' for a height that substantially corresponds to the height of the distribution element mentioned above.
  • a diffuser with rotating blades 29 is housed, said diffuser being actuated by a motor shaft 29' (connected to a suitable external rotating device) through passages 9' and 11' as well as the feeding conduit 5.
  • the punch 6 and the punch holder 26 are fixed to the press structure 1 through the plane-protecting plate 9 and the top fixed crosspiece 11.
  • the punch 6 is centered on the punch holder 26 by means of a frustoconical element 31 and is kept in contact with said punch holder 26 by means of magnetic elements 30.
  • the metal container 8 which is suspended to the rods of the actuators 10 and arranged around the punch 6 and the top punch holder 26, together with the connected shutter ring 7, acts as a tank for the ceramic granulate, insulated from the surrounding environment by a semirigid transparent panel 8'.
  • Hopper means 41 is therefore defined, that is bordered internally by the punch 6 and by the punch holder 26, and externally by the shutter ring 7 and by the container 8.
  • the hopper means 41 is shown in Figures 4 and 5.
  • the container 8 comprises a plurality of small columns 42 interposed between a top annular body 43 and a bottom annular body 44.
  • the semirigid panel 8' is arranged inside the perimeter defined by the small columns 42, and owing to its transparency the quantity of ceramic granulate in the hopper means 41 can be monitored.
  • a perimeter semi-conduit 33 arranged between the container 8 and the shutter ring 7, communicates with an external compressor. Said perimeter conduit 33, through the slit made at the base of the container 8, generates a blade of compressed air for the fluidisation of said granulate.
  • a capacitive sensor cyclically checks the preset level of the ceramic granulate and the relative restoration.
  • the opposed bottom punch consists of a metal containing body 13, having a concave shape corresponding to the enlarged shape of the ceramic object to be produced, inside which a perimeter support 34 is housed, which can be shaped and decomposed at will according to the perimeter and profile of the piece to be pressed.
  • a support plane 34' is provided at the centre of the container body 13 .
  • the perimeter support 34 and the support plane 34' can be adjusted independently and can be positioned both horizontally and vertically to thereby enable limited dimensional adjustments of the products to be produced, whereas by means of suitable arrangement of small cross bores and consequent rear joining channels they enable timely uniform distribution of the incompressible fluid on the rear of the elastic membrane 32 during the final isostatic pressing phase.
  • Said membrane 32 forming the bottom face of the ceramic piece, is hermetically anchored to the containing body 13 by means of the perimeter sealing ring 12 assisted by a second metal ring 33', provided with small concentric grooves with sharp edges that ensure the adhesion of the incompressible fluid through perimeter crushing of the membrane 32 into said grooves.
  • the same membrane 32 wraps hermetically around a stiff insert 35, comprising a disc 45 covered by the membrane 32 on both the bottom face and the top face, as shown in Figure 4.
  • the stiff insert 35 further comprises a vertical sleeve 35' connected to the disc 45; the sleeve 35' is not wrapped by the membrane 32 and is provided with peripheral circular seats for housing suitable seal and guide gaskets 35" that can slide axially within the bush 37 that is fixed to the containing body 13 so as to form a seal by means of the ringnut 38.
  • a housing wherein suction means is lodged comprising a semistatic valve 36 (see Figure 2 of the Italian application for utility model MI 98U000041 of 27.01.98).
  • the semistatic valve 36 is cyclically connected by means of conduits 39 and 39' to an external high-vacuum generator.
  • a further conduit 40 enables the incompressible fluid to flow to and from the inside of the container body 13, said incompressible fluid acting on the rear of the membrane 32 in the different phases of the press cycle.
  • a mini-actuator that is not shown can act axially on the sleeve 35' of the insert 35 and therefore on the central section of the membrane 32, varying to a limited extent its position and conditioning the thickness of the bottom of the ceramic object to be produced.
  • the stroke of the sleeve 35' is limited by a stroke-limiting element, e.g. a Seeger ring that is not shown, said Seeger ring being fixed to the portion of the sleeve 35' that is furthest from the disc element 45.
  • the seal and guide gaskets 35'' enable the sleeve 35' to remain guided in relation to the bush 37 and exert a seal action, both with regard to the incompressible fluid, which is prevented from descending by more than a given limit along the external surface of the sleeve 35', and with regard to the air aspirated through the semistatic valve 36.
  • the double acting actuators 10 push down the container 8 and the shutter ring 7, removing said container 8 from the plane-protecting plate 9 by a distance X.
  • a gap is thus identified that extends in a ring form between the shutter ring 7 and the punch 6. Through said gap the ceramic granulate contained in the hopper means 41 can reach the cavity 36' as shown by the arrows F3.
  • the mould is closed by hydraulically pushing the two half moulds 51 and 52 against each other.
  • the granulate is simultaneously pre-compressed with consequent removal of air from the granulate, said removal being amongst other things facilitated by the initial annular opening between the top punch 6 and the shutter ring 7, and furthermore by the semistatic valve 36.
  • the bottom half mould 52 is pushed against the top half mould 51 by means of the hydraulic actuators 17 and 18, that cause said mould to translate in the direction of the arrow F2.
  • the gap identified between the shutter ring 7 and the punch 6 is closed by moving the shutter ring 7 towards the plane-protecting plate 9 by means of the double acting hydraulic actuators 10.
  • the maximum, pack-programmed, closing thrust is exerted between the two half moulds. Furthermore, the elastic membrane 32 is activated that provides final isostatic compaction of the granulate in the cavity 36'.
  • the stiff insert 35 is preventively properly positioned in relation to the bottom half mould 52, by being actuated by the mini-actuator that is not shown and sliding in relation to the bush 37.
  • the incompressible fluid is sent, by means of the further conduit 40, underneath the elastic membrane 32 so as to fill a chamber 59, shown in Figure 5, identified on one side thereof by the support 34 and by the support plane 34' and on the other side thereof by the elastic membrane 32.
  • the latter is therefore pushed towards the ceramic granulate contained in the cavity 36' and determines its final isostatic pressing.
  • the membrane 32 is suitably subject again to vacuum and is repositioned on the perimeter support 34 and on the support plane 34', enabling free expansion of the pressed object 50, promptly followed by maximum opening between the two half moulds 51 and 52.
  • the bottom half mould 52 which until that moment was in the first position A, is then translated towards the second position B, approaching the horizontal conveyor 2. The latter picks the object 50 from the bottom half mould 52 and moves in the direction of the arrow F to take the object 50 towards the evacuator 3.
  • the brushing and lubricating system 24 is brought below the top half mould 51, thereby cleaning and if necessary lubricating it.
  • This cyclical cleaning operation of said punch 6 is carried out at the same time as picking up and evacuation of the pressed object 50 at the end of the programmed and promptly restored cycle.
  • the distribution means comprises a plurality of spoons 46, each one of which is provided with a pushing element 47 fixed to a vertical rod 48.
  • the spoons 46 are connected at the top to a chain system 49, driven by a drive pulley 56 along a path defined by a plurality of driven pulleys 57 and having a form that substantially corresponds to the plan shape of the object 50 to be compacted.
  • the ceramic granulate is introduced into the hopper means 41 by means of an inlet conduit 58 opening onto a side wall of the container 8, as indicated by the arrow F4.
  • the spoons 46 along their path, push the ceramic granulate along the entire internal perimeter of the shutter ring 7, thereby ensuring uniform filling of the cavity 36'.
  • the loading, pressing and unloading operations are then carried out as described previously.
  • the semistatic valve 36 can be associated with the top half mould 51, particularly with the punch 6, which is to form the visible face of the ceramic object. This solution is acceptable when the ceramic objects to be obtained have not a top quality because the semistatic valve 36 risks leaving marks on the visible face of said objects.
  • the spoons 46 can be combined with the distribution element provided with grooves 28 and possibly also with the rotating blade diffuser 29 in order to make the distribution of the ceramic granulate in the hopper means 41 more uniform.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
EP02014655A 2001-07-02 2002-07-02 Vorrichtung zur Bildung von Gegenständen Withdrawn EP1297934A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20010365 ITMI20010365U1 (it) 2001-07-02 2001-07-02 Procedimento e dispositivo per la formatura isostatica di oggetti in porcellana, ed altri materiali,con faccia a vista speculare e similari
ITMI20010365 2001-07-02

Publications (2)

Publication Number Publication Date
EP1297934A2 true EP1297934A2 (de) 2003-04-02
EP1297934A3 EP1297934A3 (de) 2004-01-14

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EP02014655A Withdrawn EP1297934A3 (de) 2001-07-02 2002-07-02 Vorrichtung zur Bildung von Gegenständen

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EP (1) EP1297934A3 (de)
IT (1) ITMI20010365U1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1882571A1 (de) 2006-07-26 2008-01-30 Ta-Ro Progetti s.n.c. di Tagliati Rodolfo E C. Isostatische Matrize zur Formung von Fliesen
CN101112770B (zh) * 2006-07-26 2011-05-25 塔利亚蒂·鲁道夫方案合伙及两合公司 用于瓷砖成型的等静压模具
CN102139509A (zh) * 2011-01-13 2011-08-03 宁波韵升股份有限公司 一种带内环陶瓷制品的制造方法
DE102013103266A1 (de) * 2013-04-02 2014-10-02 Sama Maschinenbau Gmbh Verfahren und Preßwerkzeug zum isostatischen Pressen von Gegenständen aus keramischem Granulat
RU2664093C1 (ru) * 2017-11-01 2018-08-15 Общество с ограниченной ответственностью "ИНТА-СТРОЙ" Штамп для полусухого прессования керамических изделий
CN110757622A (zh) * 2019-11-08 2020-02-07 龙游平涂耐火材料有限公司 一种耐火砖高温高压制作装置
RU2742267C1 (ru) * 2020-07-21 2021-02-04 Акционерное общество «Обнинское научно-производственное предприятие «Технология» им. А.Г.Ромашина» Способ изготовления эластичной оболочки для изостатического прессования изделий из керамических порошковых материалов

Citations (6)

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EP1882571A1 (de) 2006-07-26 2008-01-30 Ta-Ro Progetti s.n.c. di Tagliati Rodolfo E C. Isostatische Matrize zur Formung von Fliesen
US7553149B2 (en) 2006-07-26 2009-06-30 TA-RO Progetti S.N.C. Isostatic die for tile forming
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DE102013103266B4 (de) * 2013-04-02 2020-06-04 Sama Maschinenbau Gmbh Verfahren und Preßwerkzeug zum isostatischen Pressen von Gegenständen aus keramischem Granulat
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CN110757622A (zh) * 2019-11-08 2020-02-07 龙游平涂耐火材料有限公司 一种耐火砖高温高压制作装置
CN110757622B (zh) * 2019-11-08 2020-08-11 新沂新世纪高科耐火材料有限公司 一种耐火砖高温高压制作装置
RU2742267C1 (ru) * 2020-07-21 2021-02-04 Акционерное общество «Обнинское научно-производственное предприятие «Технология» им. А.Г.Ромашина» Способ изготовления эластичной оболочки для изостатического прессования изделий из керамических порошковых материалов

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